Valve-gear for engines



(No Model.)

P. MUNDT.

- VALVE GEAR FDR ENGINES. No. 573,100. Patented Dec. 15, 1896.

- 2 F ,Z' d 7 MZHESGES.

PAUL MUN DT, OF BROADWELL, ILLINOIS.

VALVE-GEAR FOR ENGINES.

SPECIFICATION formingpart of Letters Patent N 0. 573,100, dated December15, 1896. Application filed July27,1896. fierial No. 600,733.(NonioclelJ To all 2071 0122 it may concern..-

Be it known that 1, PAUL MUNDT, a citizen of the United States, residingat Broadwell, in the county of Logan and State of Illinois, haveinvented certain new and useful Improvements in Valve-Gear for Steam-Engines, of which the following is such a full, clear, and exactdescription as will enable those skilled in the art to which itappertains to make and use my said invention.

The purposes of my invention are to provide mechanism of novel andimproved form adapted to operate the slide-valve of the engine, and toprovide an engine-frame so constructed and arranged that saidvalve-actuating device may be supported thereon in suitable position tobe connected with the connecting-rod of the engine, and to providesimple and effective means whereby the valveactuating device may be adjustablyconnected with the connecting-rod of the engine.

"With these ends in view myinvention consists in certain novel featuresof construction and combinations of parts shown in the annexed drawings,to which reference is hereby made, and hereinafter particularlydescribed and specifically claimed.

Referring to the drawings, Figure 1 is a top plan View of the completemechanism. Fig. 2 is a vertical longitudinal section on the line 2 ofFig. 1. Fig. 3 is an enlarged vertical transverse section on the line 8of Fig. 2. Fig. 4 is an enlarged detached perspective view of thelink-block and link forming part of the connection between the connecting-rod and the valve-rod of the engine. Fig. 5 is an enlargeddetached perspective view of the adjusting'block which fits inside ofthe linkblock and on top of the connecting-rod.

Similar letters of reference designate like parts in all of the views. i

The main frame and the cylinder of the engine are preferably ofcast-iron, and the base A, the side pieces A, the cylinder A thesteam-chest A and the cross-head guides at are cast in one piece and aresupported on any suitable foundation B. The crank D is secured to thecrank-shaft D, which turns in suitable bearings O. The piston-rod E isconnected with the crank D by means of the connecting-rod E and thecross-head F in the usual well-known manner.

I will now describethe peculiar construction of the cross-head guide.

The upper part of each of the cross-head guides a is recessed to a depthsufficient to accommodate the cross-head F and the upper guide-plate a.The plates a are secured to the guides to by means of bolts a which passthrough. the holes in the plates a and screw into the ledges d on thecross-head guides.

The link G is supported and oscillates in boxes 9 on the base A. Theupper end g of the link G fits in a box 7L on the outer end of the barIl. The valve-rod N slides in standards N, and the bar II is connectedwith the valve-rod by means of a collar 71/ A key h serves to adjustone-half of the box It in the end of the rod 11. The lower end g of thelink G fits loosely in a hole k in the block K. A vertical slottedstandard J is secured to the main frame. A boltj passes through the slotin the standard J and screws into the hole It and serves to connect theblock K with the standard J in such manner that when the block is raisedor lowered the bolt j will slide in the slot in the standard. The blockK has a central transverse opening through which the connecting-rod Epasses. The lower surface of the opening 70 is convex, as shown in Fig.4, in order to permit rocking movement of the block K on theconnecting-rod.

The adjusting-block M fits loosely in the transverse opening of theblock K. The block M has vertical side walls 012, which, when the blockis in position in the transverse opening in, abut against the sides ofthe block K, above the opening 7c, and serve to prevent displacement ofthe block M. Midway between the side walls of the block M is a convexsurface m. lVhen the block M is in position in the opening in the blockK, the flat surface of the block M contacts with the upper surface ofthe connecting-rod E, and the screw k which screws into a hole in. thetop of the block K, bears on the convex surface m'. When the blocks Kand M are properly adjusted relative to the connecting-rod E, theconnecting-rod slides through the transverse opening 70 and under theblock M, and as the rod E reciprocates the block M rocks on the lowerend of the bolt 70 so as to prevent binding of the connecting-rod in theopening, and the screw 70 may be so adjusted as to take up lost motionor wear of the parts.

It will be seen that by means of the connection described thereciprocating movement of the connecting=rod E raises and row ers andoscillates the block K, so as to impart a rocking movement to the rod G,Which in turn imparts a reciprocating movement to the rod H and theconnected valve-rod N.

The operation of the mechanism is obvious from the description, 7 I

Having fully described my invention, What I claim as new, and desire tosecure by Letters Patent, .is'-- p 1. A valve-actuatingdevice forsteanren gin e's, consisting of a block sliding vertically on a standardseem-ed to the bed-plate and having a transverse opening through Whichthe eenne-etingneci or the engine slides, and a rocking link connectedWith said block and with the valve-rod of the engine, substantinny asset forth.

a. In a steam-engine the combination of main frame, a cylinder, apistonnn'd Working in said cylinder, at steam-chest, a valve-rod workingin said steam chest, a rotatable crank-shaft and crank, a connecting-rodconnetting said crank with said piston-rod, a slotted standard securedto the main frame, a block K fitting on the connecting-rod and slidablyconnected with said standard and a rocking link G connected with saidblock and with said valve-rod, as set forth.

3. In a steam-engine the combination of a main frame, a slotted standardsecured thereto, a reciprocating connecting-rod, a block K having atransverse opening it through which the connecting-rod passes andsli'dabljy connected with said standard, a block M fitting in thetransverse openin in the block J and having a convex surface, a screw 70in the block K bearing on the convex snrfa'ce of the block M, a rockinglink G connected with the block K and a rod H connecting said rockinglink with the valve-rod, as set forth.

In witness whereof I have hereunto subscribed my name, in the presenceof two wit= messes, at Lincoln, Illinois, this 24th of July, 1896.

PAUL MUNDT.

\Vitnesses:

JOHN H, Sins, HENRY ISENBERG.

